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Unia SAT s arm onirica w JONATHAN BALL, OF NEW YORK, N. Y.

COATING WATER-Piras.

Specification forming part of Letters Patent No. 3,375, datedDeceniber 15, 1843; Ressued September 15, 1857, No. 496.

i To all whom i may concern.'

Be it known that I, JONATHAN BALL, of the city of New York, in the State of New York, have invented a new mode of preparing metallic water-pipes to prevent corrosion and poisonous oxidation of the `metals of which the pipes may be composed; and I do hereby declare the following to be a full and accurate description thereof.

My invention consists in taking hydraulic cement made into apaste of the desired consistency and forcing it into the metallic pipe (see letter A, in accompanying drawing) in such quantities as may be necessary to prevent the oxidation orcorrosion of the metal when spread upon the interior surface of the pipe. (See letter" B, in accompanying drawing.) A small cone of wood or other hard material of one or more inches in length (see letter C, in accompanying drawing) is then inserted into the end of the pipe int-o which the cement has been forced.

The diameter of this cone should be as much ing drawing) projecting so far as thebore of the pipe will admit, for the purpose of keeping the cone in the center and producing an equal coating upon the pipe. To the apex of this cone is attached a thread or wire by means of which it is drawn through the pipe, leaving upon its interior surface the required thickness of cement.. The base of the cone as it passes through the pipe effectually closesthe traces of the spurs and leaves the cement with a smooth surface. The pipes thus prepared before the cement hardens i may be bent into any shape required, and in from twenty to thirty-six hours be ready to admitthe water under any pressure the metal of the pipe is competent to bear. The water hardens the cement and passes through the pipe as sweet and pure as though it stood in a marble or china vessel. By this means the poisonous effects of `the oxidation` and corrosion of metals, as

well as the disagreeable taste imbibed by water passing in `metallic pipes are entirely prevented and i avoided.

lVhat I claim as my invention and wish to secure by Letters Patent is` i The application of hydraulic or water cement asa coating upon the interior surface of metallic water pipes to prevent the corrosion and oxidation of the metals of which the pipes are composed; also the means by which it is accomplished as set forth in the accompanying specification.

JONATHAN BALL 1Witnesses:

H. DEWEY, JEREMIAI-i SMITH.

[Frasi: PRINTED 1913.] 

